DOI: 10.1007/s00382-011-1206-y
Scopus记录号: 2-s2.0-84861815681
论文题名: Impact of the Indian part of the summer MJO on West Africa using nudged climate simulations
作者: Mohino E. ; Janicot S. ; Douville H. ; Li L.Z.X.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 38, 期: 2017-11-12 起始页码: 2319
结束页码: 2334
语种: 英语
英文关键词: Atmospheric general circulation models
; Madden Julian Oscillation
; Nudging
; West Africa
英文摘要: Observational evidence suggests a link between the summer Madden Julian Oscillation (MJO) and anomalous convection over West Africa. This link is further studied with the help of the LMDZ atmospheric general circulation model. The approach is based on nudging the model towards the reanalysis in the Asian monsoon region. The simulation successfully captures the convection associated with the summer MJO in the nudging region. Outside this region the model is free to evolve. Over West Africa it simulates convection anomalies that are similar in magnitude, structure, and timing to the observed ones. In accordance with the observations, the simulation shows that 15-20 days after the maximum increase (decrease) of convection in the Indian Ocean there is a significant reduction (increase) in West African convection. The simulation strongly suggests that in addition to the eastward-moving MJO signal, the westward propagation of a convectively coupled equatorial Rossby wave is needed to explain the overall impact of the MJO on convection over West Africa. These results highlight the use of MJO events to potentially predict regional-scale anomalous convection and rainfall spells over West Africa with a time lag of approximately 15-20 days. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55262
Appears in Collections: 过去全球变化的重建
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作者单位: LOCEAN/IPSL, Université Pierre et Marie Curie, Tour 45-55, 4eme étage, 4 place Jussieu, 75252 Paris Cedex 05, France; LOCEAN/IPSL, IRD, Université Pierre et Marie Curie, Tour 45-55, 4eme étage, 4 place Jussieu, 75252 Paris Cedex 05, France; Universidad de Sevilla, Sevilla, Spain; Météo-France/CNRM-GAME, Toulouse, France; LMD/IPSL, CNRS, Université Pierre et Marie Curie, Paris, France
Recommended Citation:
Mohino E.,Janicot S.,Douville H.,et al. Impact of the Indian part of the summer MJO on West Africa using nudged climate simulations[J]. Climate Dynamics,2012-01-01,38(2017-11-12)